Shanghai Xinran Compressor Co., Ltd.
Main products:Air Compressor,Ingersoll Rand,Atlas Copco,Compressor Parts
Contact Us
  • Contact Person : Mr. Shao Sihua
  • Company Name : Shanghai Xinran Compressor Co., Ltd.
  • Tel : 86-21-66580603
  • Fax : 86-21-23025287
  • Address : Shanghai,shanghai,13F,No.788,West Zhijiang Rd
  • Country/Region : China
  • Zip : 200070

compressed air receiver,air system

compressed air receiver,air system
Product Detailed
PRIMARY receiver SECONDARY receivers Sizing the Air Receiver compressed air receiver

An air receiver is essential to every compressed air system to act as a buffer and a storage medium between the compressor and the consumption system. There are in principal two different air receivers in a compressed air system:

PRIMARY receiver - located near the compressor, after the after-cooler but before filtration and drying equipmentSECONDARY receivers - located close to points of larger intermittent air consumptions 

The maximum capacity of the compressor in a well designed systems always exceed the maximum mean air consumption of the system (maximum mean air consumption is the mean air consumption over some reasonable time).

Since the maximum capacity of an air compressor also always exceed the minimum air consumption in the system - the compressor must modulate its capacity during normal work, often by using primitive strategies as on/off modulating or more advanced strategies as frequency drives and inverters. Primitive modulating strategies cause more pressure variations in compressed air systems than more advanced strategies.

In addition, the air consumption vary due to the process supported. In shorter periods the demand for compressed air may even exceed the maximum capacity of the compressor. In fact, it is common in well designed systems not to design the compressor for the maximum peek loads.

Air receivers in compressed air systems serves the important purposes of

equalizing the pressure variation from the start/stop and modulating sequence of the compressorstorage of air volume equalizing the variation in consumption and demand from the system

In addition the receiver serve the purpose of

collecting condensate and water in the air after the compressorSizing the Air Receiver

The air receiver must in general be sized according

the variation in the consumption demandthe compressor size and the modulation strategy

In general it is possible to calculate the maximum consumption in the system by summarizing the demand of each consumer. The summarized consumption must be multiplied with a

usage factor ranging 0.1 - 1

depending on the system. In practice it is common that the manufacturer use standardized receivers for specific compressor models based on their know-how.

For calculating the receiver, note that it is necessary with a pressure band for the receiver to be effective. If the consumption process requires 100 psig and the compressor is set to 100 psig, there is no storage and no buffer. Any increased demand makes a pressure drop below 100 psig until the compressor controls respond by increasing the volume compressed.

If the compressors operates at 110 psig the difference between 110 psig and 100 psig accounts for the air stored in the receiver. If the demand increase, the pressure can drop 10 psig before the minimum requirement is met. Pressure and flow controllers can be used after the receiver for stabilizing downstream pressure to 100 psig and flattening demand peaks. Note that in a compressed air system the pipe work also makes the purpose of a buffered volume.

The receiver volume may be calculated with the formula

t = V (p1 - p2) / C pa         (1)


V = volume of the receiver tank (cu ft)

t = time for the receiver to go from upper to lower pressure limits (min)

C = free air needed (scfm)

pa= atmosphere pressure (14.7 psia)

p1 = maximum tank pressure (psia)

p2 = minimum tank pressure (psia)

It is also common to size receivers

to 1 gallon for each ACFM (Actual Cubic Feet per Minute), or4 gallons per compressor hp (horse power) 

Note! Receivers of unsound or questionable constructions may be very dangerous.

Air Receivers Capacities
Air Receiver Capacities (cubic feet)
Tank SizeTank SizeGauge Pressure on Tank (psig)
12 x 24101.3111519
14 x 36202.7213039
16 x 36304.0314559
20 x 48608.06290117
20 x 63801183120156
24 x 6812016125180234
30 x 8424032250360467
1 ft3 = 0.02832 m31 inch = 25.4 mm1 psig = 6.9 kPa = 0.069 bar1 Gallon (U.S.) = 3.785x10-3 m3 = 3.785 dm3 (liter) = 231 in3

compressed air receiver,air system

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